122100111111 has 64 divisors (see below), whose sum is σ = 189173606400. Its totient is φ = 69339110400.

The previous prime is 122100111083. The next prime is 122100111113. The reversal of 122100111111 is 111111001221.

It is not a de Polignac number, because 122100111111 - 2⁵ = 122100111079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14478066 + ... + 14486496.

It is an arithmetic number, because the mean of its divisors is an integer number (2955837600).

Almost surely, 2^122100111111 is an apocalyptic number.

122100111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122100111111 is a deficient number, since it is larger than the sum of its proper divisors (67073495289).

122100111111 is a wasteful number, since it uses less digits than its factorization.

122100111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8920.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 122100111111 its reverse (111111001221), we get a palindrome (233211112332).

The spelling of 122100111111 in words is "one hundred twenty-two billion, one hundred million, one hundred eleven thousand, one hundred eleven".